What the OMNImax 3719-074 costs to run
The OMNImax 3719-074 is certified by ENERGY STAR at 240 kWh a year, about average for its category to run among dishwashers currently certified.
That $45 is priced at 18.8¢/kWh, the average of all 51 state rates this site tracks. Your own state's rate is one click away.
How the OMNImax 3719-074 compares to other dishwashers
The category average is 232 kWh/yr; this model runs 3.4% above it, ranking 676 of 737 dishwashers tracked here for running cost. 737 certified dishwashers, one average, about $2/year of daylight between it and this model; the full methodology has the rest.
Neighbouring models
Right next to the OMNImax 3719-074 on that list: Monogram ZDT985**N*** ($45/yr, 240 kWh/yr) runs slightly less, while OMNImax 3719-075 ($45/yr, 240 kWh/yr) runs slightly more.
Comparing OMNImax's own models
Of the 2 ENERGY STAR certified dishwashers OMNImax makes, the 3719-074 is the cheapest to run, about the same, within a dollar a year, less than OMNImax's priciest, the 3719-075.
What this adds up to over time
NAHB's Study of Life Expectancy of Home Components puts a typical dishwasher's service life at 9 years; run the OMNImax 3719-074 that long and it costs about $406 in electricity, on top of whatever it cost to buy.
Shopping for a new one
Efficient as certified dishwashers go, $45/year is a reasonable baseline if you're comparing what else is on the market.
Worth comparing a few current certified models before deciding.
If you're keeping it
A dishwasher like the OMNImax 3719-074 is a real household expense whether or not it needs replacing yet; a protection plan is one way to budget for a repair rather than a full replacement.
How this was checked
Nothing here is estimated from a nameplate wattage; the 240 kWh/yr is ENERGY STAR's own certified figure for this model. Ranked 676 of 737, the OMNImax 3719-074 sits in the middle of the dishwasher category, see the guide to why your state changes this number for the other half of the math.